London to Reykjavík — what Altius has recorded

Altius recorded 248 priced readings of nonstop business-class round trips from London (LHR) to Reykjavík (KEF) booked 30 days out, across 120 departure dates between 2026-06-06 and 2026-10-04. Observed fares ran from US$467 to US$1,854. The lowest fare Altius scored on this window was US$467 for a 2026-10-18 departure, seen on 2026-09-18 — LEGENDARY at the time, 46.4% below the US$871 this route was typically running that day.

Altius recorded 248 priced readings of nonstop business-class round trips from London (LHR) to Reykjavík (KEF) booked 60 days out, across 120 departure dates between 2026-06-06 and 2026-10-04. Observed fares ran from US$438 to US$1,703. The lowest fare Altius scored on this window was US$438 for a 2026-11-26 departure, seen on 2026-09-27 — IMPRESSIVE at the time, 22.1% below the US$562 this route was typically running that day.

Altius recorded 250 priced readings of nonstop business-class round trips from London (LHR) to Reykjavík (KEF) booked 90 days out, across 120 departure dates between 2026-06-06 and 2026-10-04. Observed fares ran from US$446 to US$1,191. The lowest fare Altius scored on this window was US$446 for a 2026-12-03 departure, seen on 2026-09-04 — STRONG at the time, 16.5% below the US$534 this route was typically running that day.

A fare can move between our two readings of the same day, most often on the days furthest below typical. Where a day's two readings differ enough to matter, the chart marks that day and both readings can be read separately.